Manufacture of a diaper with a multi-component tape fastener

ABSTRACT

Tabless adhesive fasteners are provided for diapers. In one aspect of the invention, one face of each adhesive fastener is permanently bonded to the diaper assembly proper at an associated permanent-bond area of the diaper assembly proper at one of the two lateral sides of the diaper assembly proper and adjacent the periphery of the diaper assembly proper. The other face of each adhesive fastener is releasably carried by liner or tape protective means carried on an area of the diaper assembly proper which is offset from such associated permanent-bond area. In another aspect of the invention, the adhesive fasteners include an adhesive layer which penetrates the water-permeable inner layer of the diaper assembly proper and adhesively interacts with the water-impermeable outer layer of the diaper assembly proper, whereby such adhesive layer and inner and outer diaper layers cooperate to provide a reinforced fastener base. Each adhesive fastener may comprise two adhesive layers with a carrier layer between them.

This application is a continuation of application Ser. No. 08/277,778,filed Jul. 20, 1994, now U.S. Pat. No. 5,462,540, which is acontinuation of application Ser. No. 07/845,195, filed Mar. 2, 1992, nowabandoned.

This invention relates to disposable diapers provided withself-contained adhesive fastener means for releasably fastening thediapers.

Diapers of this general kind are widely used. A successful type ofdiaper construction comprises an absorbent pad or batt or the likeenclosed in an outer plastic shell of water-impermeable plastic film andan inner water-permeable shell or liner. The outer and inner shells arejoined at a margin around the periphery of the diaper with the battcaptured between them and spaced inwardly from the outer periphery. Thisconstruction may be referred to as the diaper assembly proper.

In such diaper assembly constructions, the absorbent batt is relativelythick and therefore bulky. Although materials of increased waterabsorbency have been developed to enable the bulk of the batt to bereduced, the batt remains relatively bulky as compared to the inner andouter shells.

Diapers of this general kind are provided with adhesive fastener meansin the form of adhesive tabs fastened to one end of the diaper assemblyconstruction at each lateral side of the diaper. The tabs have a facecoated with pressure-sensitive adhesive. The tabs are releasablyattachable to the other end of the diaper at each lateral side. Theattachment is releasable both to allow permanent removal of the diaperand to allow unfastening to inspect the diaper followed by refasteningif indicated.

In accordance with known practice, as illustrated for example in U.S.Pat. No. 4,753,649 to Pazdernik, the diaper may be provided at suchother end with a stretch-resistant tab-receiving tape of polypropyleneor other resin applied over the outer plastic shell both to reinforcethe outer plastic shell (which may be relatively thin, stretchy, andprone to tearing) and to provide a smooth or matte peel-back releaseface to receive the sticky adhesive face of each tab when the tab isfastened. In a known manner, the release face and the pressure-sensitiveadhesive of the tab are selected to give controlled release of theadhesive face from the tab-receiving tape, such that separation isstrongly resisted when the tab is subject to lengthwise tensile loads aswhen the diaper is snugly wrapped and fastened around the wearer, butnot when a tab end is peeled back from the tab-receiving face. Peelbackoccurs without tearing or stretching of the diaper or tab-receivingface. If desired, the adhesive face can be reclosed against thetab-receiving face to re-establish a strong bond. The relation whereinthe tab strongly resists separation under tension but may be readilypeeled back may be referred to as peelable bonding, and in this sensethe tape may be said to be peelably bonded to the tab-receiving tape.

In general, the releasable fastening means of the prior art havecomprised tabs fixed to the edges of the diaper at one end. The stickyadhesive face of each tab must be protected against contamination duringstorage and shipping of the diaper prior to use. In an earlyconstruction, the sticky face of each tab was protected with a piece ofdisposable release liner formed as the outer layer of the tab. When thediaper was applied, these small pieces were peeled off and thrown away.This was both inconvenient and environmentally undesirable because ofthe necessity of separately disposing of the small pieces of protectiveliner.

In current constructions, separate release liners are generally avoided.Instead, in the packaged and stored condition of the unused diapers, theadhesive tabs are stored in a position where they are folded back fromthe diaper edge, with the sticky adhesive face in releasable contactwith a release means permanently bonded to the diaper. This self-storingrelease-liner arrangement avoids any need to dispose of separate smallpieces of protective liner.

Efforts have been made to avoid the use of separate adhesive tabsaltogether, and instead use adhesive areas on the diaper assemblyproper.

In U.S. Pat. No. 2,649,848 to Le Bolt, diapers are provided with"self-sealing" adhesive which seals only to itself. Since the adhesiveis self-sealing, the diaper is not readily reclosable because it cannotbe readily opened without destroying or severely impairing the adhesivejoint--the same joint that must be re-established to accomplishreclosing.

In U.S. Pat. No. 3,049,228 to Burnett, diaper-like paper towel stock isemployed. Towel-like blanks or panels are provided with "mutuallycohesive" adhesive which, similarly to Le Bolt, seals only to itself.The diaper-like construction cannot be reclosed and the arrangement doesnot lend itself to use with more successful types of disposable diaperconstructions using absorbent batts between inner permeable linings andouter impermeable shells.

In U.S. Pat. No. 3,554,195 to Murdoch, adhesive areas on the diaperassembly proper are provided, each protected by a piece of separatelyremovable liner. This arrangement is not self-storing in respect of therelease liner, and has the disadvantages mentioned above in respect ofseparate small pieces of liner requiring separate disposal.

In U.S. Pat. No. 3,638,351 to Torr, adhesive areas and release linersare provided on the diaper assembly proper. However, this is done bydirect coating of both the adhesive layers and release layers. Thesesteps would be costly and difficult to implement on a diapermanufacturing line. The adhesive faces are not peelably bonded at theclosure joints, and the diapers are not reclosable as disclosed. Thefirst embodiment relies on adhesive-to-adhesive contact for closure. Inother embodiments, fastening depends on bringing patches ofpressure-sensitive adhesive coated on the outer diaper shell intoadhering contact with the water-permeable body-contacting layer. Thismay result in weak bonds which are prone to readily tear, and which donot perform satisfactorily as reclosable joints.

In U.S. Pat. No. 3,840,013 to Mesek, adhesive areas are provided atmarginal portions of the diaper assembly proper by direct coating ontothe inner diaper layer, some of the adhesive soaking through to theouter diaper layer. Alternatively, double-face tape is applied to theinner diaper layer at the marginal portions. In both alternatives, as inMurdoch, the adhesive areas are protected by separate pieces of releaseliner, so that the arrangement is not self-storing in respect of liner,and requires separate disposition of the small pieces of protectiveliner. Also the adhesive faces are not peelably bonded at the closurejoints, and the diapers are not reclosable as disclosed.

In U.S. Pat. No. 3,971,380 to Tritsch, again adhesive areas are providedat marginal portions of the diaper assembly proper and in structuralassociation with both the inner and outer diaper layers. However again,as in Murdoch, the adhesive areas are protected by separate pieces ofrelease liner, so that the arrangement is not self-storing in respect ofliner, and requires separate disposition of the small pieces ofprotective liner.

In U.S. Pat. No. 4,985,025 to Lingertat et al., the diaper assemblyproper is modified by extending the outer shell of the diaper assemblyproper beyond the inner shell to provide "ears" or "flaps" of the outershell of thin, stretchy, water-impervious material. A pressure-sensitiveadhesive is permanently bonded to these ears to provide a stickyfastening face. In one embodiment, in the storage position, the stickyfastening face of each ear is carried on a release carrier bonded to theinner shell. The result is a self-storing release liner arrangement, butcertain drawbacks are present. The ear relied on as a fastening tabfunctions poorly as a fastening tab because it consists of the outershell material which is relatively thin and subject to stretching andtearing. In another embodiment, the release liner is also carried on theear of outer shell material. Again, the ear functions poorly as afastening tab for the same reasons as apply to the first embodiment.Moreover, the release liner either requires separate disposal or half ofthe sticky fastening face remains permanently covered by the releaseliner, further reducing the fastening effectiveness of the tab.

THE PRESENT INVENTION

The present invention provides a tabless diaper construction whichovercomes the disadvantages of the prior art discussed above. Theconstruction readily lends itself to current diaper manufacturingoperations. Diapers are fastened securely, and may readily reopened andreclosed. The construction is self-storing in respect of release liner.

In one aspect of the invention, one face of each adhesive fastener ispermanently bonded to the diaper assembly proper at an associatedpermanent-bond area of the diaper assembly proper at one of the twolateral sides of the diaper assembly proper and adjacent the peripheryof the diaper assembly proper. The other face of each adhesive fasteneris releasably carried by liner or tape protective means carried on anarea of the diaper assembly proper which is offset from such associatedpermanent-bond area. In another aspect of the invention, the adhesivefasteners include an adhesive layer which penetrates the water-permeableinner layer of the diaper assembly proper and adhesively interacts withthe water-impermeable outer layer of the diaper assembly proper, wherebysuch adhesive layer and inner and outer diaper layers cooperate toprovide a reinforced fastener base. Each adhesive fastener may comprisetwo adhesive layers with a carrier layer between them.

BRIEF DESCRIPTION OF THE DRAWINGS

The objects and advantages of the invention will be more fullyunderstood from the following description of specific embodiments, takentogether with the accompanying drawings, in which:

FIG. 1 is a schematic sketch of a diaper and fastener embodying theinvention at a stage of manufacture and use.

FIG. 2 is a schematic sketch of a diaper and fastener embodying theinvention at a stage of manufacture and use.

FIG. 3 is a schematic sketch of a diaper and fastener embodying theinvention at a stage of manufacture and use.

FIG. 4 is a schematic sketch of a diaper and fastener embodying theinvention at a stage of manufacture and use.

FIG. 5 is a schematic sketch of a diaper and fastener embodying theinvention at a stage of manufacture and use.

FIG. 6 is a cross-sectional view taken along line 6--6 of FIG. 1.

FIG. 6A shows a detail of FIG. 6.

FIG. 7 is a cross-sectional view taken along line 7--7 of FIG. 2.

FIG. 8 is a cross-sectional view taken along line 8--8 of FIG. 3.

FIG. 9 is a cross-sectional view taken along line 9--9 of FIG. 4.

FIG. 10 is a cross-sectional view taken along line 10--10 of FIG. 5.

FIG. 11 is a view similar to FIG. 10 but on a reduced scale, showing thesame elements in the same topological relationship, but bettersuggesting the relative positions of the parts in actual use.

FIG. 12 is a view similar to FIG. 11, still better suggesting therelative positions of the parts in actual use.

DETAILED DESCRIPTION OF THE INVENTION

While the present invention is specifically described in connection withthe diapering of infants, it will be understood that it is alsoapplicable to diapering of incontinent adults.

Shown in the drawings is a diaper 10. According to known practice, thediaper assembly proper has first and second ends 12 and 14 and comprisesa moisture-pervious inner layer 16 of flexible nonwoven fabric or thelike adapted to be positioned against the wearer's body, an absorbentpad or batt 18 adjacent the inner layer 16, and a moisture-imperviousouter layer 20 of plastic film such as polyethylene or the like adjacentto the absorbent batt 18. (To simplify the drawings, the batt 18 is notshown in FIGS. 4 and 5.)

As shown, the inner and outer layers 16 and 20 have an hour-glassconfiguration. As also shown, the batt 18 may also have an hour-glassconfiguration, although in many cases it is preferred for the batt tohave a substantially rectangular configuration. In any event, the twolateral sides of the assembly are spaced further apart at each diaperend than at the diaper center. The inner and outer layers 16 and 20 aresecured to one another laterally outwardly of the absorbent batt 18 toprovide at the periphery of the configuration a flexible two-layerbattless diaper margin 22. The width of this margin is shown asapproximately uniform along the lateral sides of the diaper, but whenthe batt is rectangular in shape, this margin at each lateral side ofthe diaper will be considerably wider at the ends of the diaper than itis at the central portion thereof.

At the stage of manufacture illustrated in FIGS. 1 and 6,fastener-receiving or permanent-bond areas 24 at each lateral side ofthe first end 12 of the diaper assembly have yet to receive the adhesivefastening means contemplated by the invention. Preferably, the fasteningmeans is a double-coated adhesive fastener assembly 26. Duringmanufacture, each fastener assembly 26 may be initially applied to thediaper not at the fastener-receiving or permanent-bond areas 24, butrather at adjacent areas inboard of the latter areas, each assembly 26being applied in combination with a self-storing release liner 27.

Each self-storing release liner may comprise a base layer 27a providedwith a release coat 28 of silicone or the like, and may be permanentlyadhered to the layer 16 by a suitable adhesive such aspressure-sensitive adhesive 29. The combined fastener assembly 26 andrelease liner 27 may be applied as a single unitarily-appliedmulti-component tape 30 consisting of all the tape elements seen in FIG.6. This multicomponent tape may be applied using conventional tape orlabel application practices. Use of such tape lends itself well toestablished diaper manufacturing procedures.

Each double-coated adhesive fastener assembly 26 may include a carrier32 of polypropylene film or nylon scrim or the like, and first andsecond adhesive layers 34 and 36 in permanently bonded relationship tothe carrier 32. The transfer of each fastener assembly 26 to itsassociated fastener-receiving area 24 is initiated by folding a marginalportion of the diaper inwardly as seen in FIGS. 2 and 7, thus bringingthe first adhesive layer 34 into contact and permanently bonded relationwith the diaper margin at the permanent-bond area 24.

In the illustrated construction, the exterior faces of the adhesivelayers 29 and 34 will be seen to constitute two exterior faces presentedby the multi-component tape 30 prior to its application to the diaper,one (the exterior face of layer 34) being associated with the adhesivemeans 26 and the other (the exterior face of layer 29) being associatedwith the release liner 27.

When the multi-component tape is fully applied as seen in FIGS. 2 and 7,these two exterior faces are seen to be applied to two adjacent areas ofthe inner face of the diaper (face of inner layer 16); such two areaswill be seen to be the fastener-receiving area 24 and the (unnumbered)area of permanent bond between the release liner 27 and the diaper.

Thus, as to each lateral side of the diaper, it will be seen that theunitary application of the single multi-component tape as describedcomprises applying one of the two exterior faces of the multi-componenttape to one of the aforesaid two adjacent areas of the inner face of thediaper, and folding the diaper around the described hinge line tothereby apply the other of the two exterior faces of the multi-componenttape to the other of the aforesaid two adjacent areas of the inner faceof the diaper.

Thus it is seen that during diaper manufacture, only a single tape,formed as a unitarily-applied multi-component tape comprising bothfastener means and protective release liner, need be applied at eachlateral side of the diaper to provide each side with protectively-storedadhesive fastening means. As will be described below, theprotectively-stored fastening means provided by the single tape isadapted for deployment by releasing the fastening means from the releaseliner.

While the schematic drawings show the adhesive layer 34 merelycontacting the moisture-permeable inner layer 16 of the diaper, thislatter layer is actually a flexible nonwoven fabric or the like which ispenetrated by the adhesive, and whose fibers are enveloped and capturedby the adhesive. The penetrating adhesive 34 also adhesively interactswith or adheres to the outer layer or shell 20. The adhesive 34 and thelayers 16 and 20 thus cooperate at the fastener-receiving area 24 toprovide a reinforced fastener base at this area. The adhesive 34 may beselected to have desired rheological and adhesive properties for thesepurposes. The following formulation by weight percent may be used forthe adhesive layer 34:

    ______________________________________                                        Kraton 1117 (Shell Chemical)                                                                         42.0                                                   Escorez 1310LC (Exxon Chemical)                                                                      35.0                                                   Herculyn D (Hercules)  11.0                                                   Foral 85 (Hercules)    10.0                                                   Ethanox 330 (Ethyl)    1.0                                                    Plastonox LTDP (American Cyanimid)                                                                   1.0                                                    ______________________________________                                    

This same formulation may be used for the adhesive layer 29.

The diapers may be packaged in groups of, say, ten or twenty or more forshipment and sale in the configuration just described, with the marginaledges folded inwardly as shown in FIGS. 2 and 7. Each diaper is foldedend-on-end in a manner similar to the end-on-end folding seen in FIGS. 4and 5. In this configuration shown in FIGS. 2 and 7, the entiremulticomponent tape 30, including the fastener assembly 26 together withthe layers 27-29, remains together. At this stage, the adhesive layer 29of the release liner remains permanently associated with the innerdiaper liner 16, the first adhesive 34 of the fastener assembly 26remains permanently associated with the diaper margin 22 in the mannerdescribed, and the face of the second adhesive layer 36 remains inprotected condition in contact with the release coat 28 of the releaseliner 27.

In accordance with known practice, and as previously described above,when conventional adhesive tabs are used, it is known to provide atab-receiving tape applied over the outer plastic shell both toreinforce the outer plastic shell and to provide a peel-back releaseface to receive the sticky adhesive face of each tab when the tab isfastened. In a known manner, the pressure-sensitive adhesive of the tabis selected to give controlled release of the adhesive face from thetab-receiving tape, such that separation is strongly resisted when thetab is subject to lengthwise tensile loads as when the diaper is snuglywrapped and fastened around the wearer, but not when a tab end is peeledback from the tab-receiving face. The present invention may also usesuch a tape, but instead of receiving tabs it receives the fastenerassemblies 26. A fastener-receiving tape 40 of polypropylene or the likemay be provided, heat-sealed or adhered as by adhesive layer 42, to thediaper's outer layer 20 near the second or front diaper end 14, andpositioned to receive the adhesive face 34 of each adhesive fastenerassembly 26 when the diaper is closed, as described below. The tape 40,if employed, may include a release coating of silicone or the like or,as shown, the tape may include no release coating as such.

When a fastener-receiving tape 40 of polypropylene or the like isemployed, the following formulation by weight percent may be used forthe adhesive layer 36:

    ______________________________________                                        Kraton 1107 (Shell Chemical)                                                                         31.7                                                   Escorez 1310LC (Exxon Chemical)                                                                      46.3                                                   Wingtack 10 (Goodyear Chemical)                                                                      19.8                                                   Ethanox 330 (Ethyl Corp.)                                                                            1.0                                                    Plastonox LTDP (American Cyanimid)                                                                   1.2                                                    ______________________________________                                    

The same formulation may be used for an adhesive to adhere the tape 40to the moisture-impervious outer layer 20 of polyethylene or the like.

When a fastener-receiving tape 40 is not employed, the followingformulation may be used for the adhesive layer 36, which directlyengages the moisture-impervious outer layer 20 of polyethylene or thelike:

    ______________________________________                                        Kraton 4141 (Shell Chemical)                                                                         42.3                                                   Piccolyte A-115 (Hercules)                                                                           39.1                                                   Kristalex 1120 (Hercules)                                                                            6.2                                                    Herculyn D (Hercules)  10.4                                                   Ethanox 330 (Ethyl Corp.)                                                                            1.0                                                    Plastonox LTDP (American Cyanimid)                                                                   1.0                                                    ______________________________________                                    

When the diaper is to be applied to a baby, it is removed from itspackaging and the marginal edges that were folded inwardly are unfolded,thereby peeling the adhesive 36 from the release liner 27 and completingthe transfer of each fastener assembly 26 to its associatedfastener-receiving area 24, as seen in FIGS. 3 and 8. The diaper isfolded between the baby's legs in the usual manner so that the ends 12and 14 wrap around the back and front of the baby's waist and meet atthe sides. A flattened version of this condition of the diaper is seenin FIGS. 4 and 9. If desired, the diaper may be placed on the babybefore the marginal edges are unfolded, and in general this will be thepreferred sequence because the face of the adhesive 36 remains protectedduring the time the diaper is being placed on the baby. In other words,before the marginal edges are unfolded from the condition seen in FIGS.2 and 7, the diaper itself can be unfolded and placed on the baby andrefolded to cover the baby's crotch, with the first end 12 of the diapercovering the back of the baby's waist and the second end 14 covering thefront of the baby's waist. The diaper margins are then unfolded to thecondition seen in FIGS. 3, 4, 8 and 9 to expose the face of the adhesivelayer 36 (i.e., to deploy the fastening means 26). The diaper is thenfastened by placing the opened marginal portions over the ends of thefastener-receiving tape 40 to apply the adhesive face 36 of eachfastener assembly against the tape. This fastened condition is shown atthe left side of FIG. 5 and in FIG. 10. FIG. 11 is similar to FIG. 10and shows the same elements in the same topological relationship, butbetter suggests the relative positions of the parts of one of thefasteners when the diaper is positioned on the baby and closed andfastened at each side of the baby's waist. The baby's waist would be tothe right as the closure is viewed in FIG. 11. The parts as seen in FIG.11 shown as flat for simplicity of illustration, but in actuality wouldof course tend to follow the curvature of the baby's waist.

FIG. 12 even better suggests the relative positions of the parts whenthe diaper is on a baby, since it is not likely, when the diaper isapplied and snugged around the baby, that the adhesive face 36 will beapplied against the portion of the fastener-receiving tape 40 whichoverlies the margin 22 at the second end 14. Rather, it will be naturalfor the person applying the diaper to apply the face 36 to portions ofthe tape 40 somewhat nearer the lateral center of the diaper, as shownin FIG. 12. It may therefore be preferred to eliminate the portions ofthe fastener-receiving tape ends which overlie the margin 22 at eachside of the diaper at the second end 14, so that the tape 40 terminatesat each of its ends short of the margin 22. FIG. 12 shows thisalternative, the fastener-receiving tape being shown as terminated atend 43, short of the associated margin portion 22 of the diaper. Again,in actuality the parts would not be flat as shown, but would follow thecurvature of the baby's waist.

As with the tabs of the prior art used with tab-receiving tapes, theadhesive 36 is selected to give controlled release of the adhesive facefrom the fastener-receiving tape 40. This controlled release is suchthat separation is strongly resisted when the tab is subject tolengthwise tensile loads, as when the diaper is snugly wrapped andfastened around the wearer, or when it is stressed by movements of thewearer, but not when the fastener assembly 26 and the portion of themargin 22 to which it is permanently adhered are peeled back from thefastener-receiving face of the tape 40 to open the fastening. A peelbackgrip for starting the peeling action is provided by the portions of themargin 22 immediately to the side of the fastener-receiving areas 24,such as the margin portion labelled 23 in FIG. 5.

Peelback occurs without significant tearing or stretching of therelatively fragile shell 16 or of the fastener-receiving face of thetape 40, and the fastening is thereby opened, as illustrated at theright side of FIG. 5 as to one side of the diaper. At this point thediaper can be discarded after opening both sides, or the diaper can beinspected and reclosed. To reclose, the exposed adhesive face of theopened fastener assembly 26 can be reclosed against the tape 40 tore-establish a strong bond. Again, when the diaper is to be removed orreinspected, this strong bond can be broken by peeling back aspreviously described.

The relation wherein the fastener assembly 26 strongly resistsseparation under tension but may be readily peeled back providespeelable bonding as referred to above, and matches the performance ofprior-art adhesive fastening tabs in this regard.

Instead of providing the multicomponent tape 30 including the specialrelease liner 27, when a fastener-receiving protective tape 40 isemployed, the adhesive fastener assembly 26 may be combined with thetape 40 at the factory to provide a flattened and folded constructionsimilar in appearance to that seen in FIGS. 5 and 10 (but of coursewithout the release liner 27 and associated elements 28 and 29), orsimilar in appearance to that of a flattened and folded constructioncorresponding to the unfolded construction seen in FIG. 12 (again,without the release liner 27 and associated elements 28 and 29).

This may be accomplished by directly applying a pair of double-coatedadhesive fastener assemblies to the fastener-receiving areas at thefirst end 12 of the diaper, applying the tape 40 to the second end 14 ofthe diaper, and folding the diaper and the margins at the first end 12to bring the ends of the diaper together and close both sides of thediaper to the flattened condition similar to that shown at the left sideof FIG. 5. A number of diapers configured in such flattened and closedcondition can be packaged together for shipment and sale.

In the left side of FIG. 5, the leftmost vertical line in the drawingwill be seen to be the hinge line around which the diaper is wrapped, inthe vicinity of the associated fastener-receiving area 24, when thediaper is in such flat and closed condition.

While it is preferred to provide a double-coated adhesive fastenerassembly 26 as described above for each side of the diaper, it is alsocontemplated that the fastener 26 be replaced by an adhesive fasteningmeans comprising a single adhesive layer in place of the layers 34 and36, in which case the carrier 32 is eliminated. Suchsingle-adhesive-layer fastener may be combined with the release liner 27to be transferred therefrom in a manner similar to that described forthe double-coated fastener assembly 26. The reinforcing effect of thecarrier is not present in such construction, but the single adhesivelayer penetrates the inner diaper layer 16 of flexible nonwoven fabricor the like whose fibers are enveloped and captured by the singleadhesive layer. The single adhesive layer adhesively interacts with theouter layer or shell 20, so that the single adhesive layer and thelayers 16 and 20 cooperate to provide a reinforced fastener base in themanner previously described in connection with adhesive layer 34.

Alternatively, such single adhesive layer may be transfer-applied to andcombined with the tape 40 at the factory in a manner similar to thecombining of the multicomponent tape 30 as described above, thuseliminating use of a special release liner such as liner 27.

Where the fastener-receiving tape is not provided to act as thepeel-back release-face means against which the face of adhesive layer 36(or the face of a single-adhesive-layer fastening means) is releasablyadhered when the diaper is fastened on a baby, the moisture-imperviousouter liner or layer 20 of the diaper proper may perform such functionand act as the peel-back release-face means. In cases where neither therelease liner 27 nor the fastener-receiving tape 40 is provided andtherefore neither is available to act as protective means for the faceof adhesive layer 36 (or for the face of a single-adhesive-layeradhesive fastening means), the moisture-impervious outer liner or layer20 may also function as such protective means against which the face ofthe adhesive fastening means is releasably adhered to be protectedduring shipment and storage.

It should be evident that this disclosure is by way of example, and thatvarious changes may be made by adding, modifying or eliminating detailswithout departing from the fair scope of the teaching contained in thisdisclosure. The invention therefore is not limited to particular detailsof this disclosure except to the extent that the following claims arenecessarily so limited.

What is claimed is:
 1. In the manufacture of a tablessadhesively-fastenable diaper which includes a diaper assembly properhaving an inner face and an outer face and two lateral sides, and havinga periphery of generally hour-glass configuration, the improvementcomprising:providing multi-component tape stock comprising adhesivefastening means and also comprising, in combination with said adhesivefastening means, protective means in the form of a release linerreleasably combined with said adhesive fastening means, saidmulti-component tape stock presenting two exterior adhesive faces, oneassociated with said adhesive fastening means and the other with saidrelease liner, applying one of said two exterior faces of amulti-component tape supplied from said stock to said inner face of saiddiaper assembly proper at one end thereof and in association with one ofsaid two lateral sides of said diaper assembly proper therebypermanently bonding said multi-component tape to said inner face of saiddiaper assembly proper at a first area associated with said one of saidtwo lateral sides, folding said diaper around a hinge line therebyapplying the other of said two exterior faces of the multi-componenttape to said inner face of said diaper assembly proper therebypermanently bonding said multi-component tape to said inner face of saiddiaper at a second area adjacent said first area and on the other sideof said hinge line therefrom, whereby said multi-component tape isbonded to said inner face of said diaper assembly proper at both saidfirst and second areas, one of said first and second areas being an areaof permanent bond of said adhesive fastening means to said inner faceand the other of said first and second areas being an area of permanentbond of said release liner to said inner face, and concurrently orsuccessively duplicating said applying and folding steps to also applysaid two exterior adhesive faces of another multi-component tapesupplied from said multi-component tape stock to said inner face of saiddiaper assembly proper at said one end thereof and in association withthe other of said two lateral sides of said diaper assembly properthereby permanently bonding said another multi-component tape to saidinner face of said diaper assembly proper at both of another first andsecond areas associated with said other of said two lateral sides ofsaid diaper assembly proper, one of said another first and second areasbeing an area of permanent bond of said adhesive fastening means to saidinner face and the other of said another first and second areas being anarea of permanent bond of said release liner to said inner face, wherebyduring diaper manufacture only a single tape, formed as aunitarily-applicable multi-component tape comprising both said adhesivefastening means and said protective release liner, is applied at each ofsaid two lateral sides of the diaper assembly proper to provide eachside with protectively stored adhesive fastening means adapted fordeployment by releasing said adhesive fastening means from itsassociated release liner.
 2. The method of claim 1, wherein the steps ofpermanently bonding said two exterior faces of said multi-component tapeto said inner face of said diaper assembly proper at said first andsecond areas include forming said permanent bond of said release linerat said second area laterally inward of said associated permanent-bondarea of said adhesive fastening means at said first area.